The semicolon is used for making helpful comments or notes on a line of code. All the characters will turn grey after a semicolon is used. Keep in mind that whenever a semicolon is used at the beginning of the line, this part of the code will not run. More than one semicolon can be used for emphasis. For example:
;; this procedure moves the fish forward
to move-fish
ask fish [ fd 1 ]
end
Once you mastered the semicolon primitive, don't stop there. Check out the resources below to improve your NetLogo skills.